Hi Sitara Support Team,
Regarding DDR3 operation, is there any information for the wait time from register setting to using DDR3?
[Background]*****************************************************************
-Depending on the DDR size and the cpu speed on the same board,
there are differences operating as follows.
<Board #1: Operating OK>
・AM3352 300MHz with DDR3: 303MHz
・samsung: K4B1G1646E-BYK0(size:1Gb)
<Board #2: Operating NG>
・AM3352 600MHz with DDR3: 303MHz
・samsung: K4B4G1646E-BYK0(size:4Gb)
<Board #2 + Adding 350us wait time: Operating OK>
・AM3352 600MHz with DDR3: 303MHz
・samsung: K4B4G1646E-BYK0(size:4Gb)
[Register setting]
-SDRAM_CONFIG :0x61C05232 //size:1G
-SDRAM_CONFIG :0x61C05332 //size:4G
-SDRAM_REF_CTRL :0x93B
-DDR_IO_CTRL :0x00000000
-VTP_CTRL *controlled it as the AM335x EMIF Configuration tips site
-VREF_CTRL :0x00000000
-DDR_CKE_CTRL :1
-DDR_CMD0_IOCTRL/ DDR_CMD1_IOCTRL/ DDR_CMD2_IOCTRL :0x0000018B
-DDR_DATA0_IOCTRL/ DDR_DATA1_IOCTRL :0x0000018B
-DATA_PHY_RD_DQS_SLAVE_RATIO :0x3a
-DATA_PHY_FIFO_WE_SLAVE_RATIO :0x9a
-DATA_PHY_WR_DQS_SLAVE_RATIO :0x3c
-DATA_PHY_WR_DATA_SLAVE_RATIO :0x75
[Other setting data]
-SDRAM_TIMING1 :0x0888B3DB
-SDRAM_TIMING2 :0x2A517FDA
-SDRAM_TIMING3 :0x501F84EF
-READ_LATENCY :0x07
-ZQ_CONFIG :0x50074BE4
*******************************************************************************
Best regards,
Kanae